Home / 509,931.20-764,864.40-172,971.20

Finding the Fourth Proportional to 509,931.20, 764,864.40 and 172,971.20

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Solution

The fourth proportional to 509,931.20, 764,864.40 and 172,971.20 is: 259,445.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,931.20 : 764,864.40 = 172,971.20 : x
  2. Step 2: Convert to fraction form
    509,931.20/764,864.40 = 172,971.20/x
  3. Step 3: Cross multiply
    509,931.20x = 764,864.40 × 172,971.20
  4. Step 4: Simplify right side
    509,931.20x = 132,299,513,105.28
  5. Step 5: Solve for x
    x = 132,299,513,105.28/509,931.20
  6. Step 6: Final answer
    x = 259,445.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.